Mixtures based on polycarbonates having improved physical and chemical properties
AssigneeGeneral Electric Company
InventorsJan de Boer, Jean M. H. Heuschen
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Abstract
The invention relates to polymer mixtures which comprise a polycarbonate resin, a graft copolymer having an elastomeric core, and a block copolymer of a polycarbonate and a polysiloxane. These polymer mixtures have only a small tendency to delamination and a good impact strength.
Claims4
A polymer mixture comprising aromatic polycarbonate resin having two polymeric additives one of Which is formed by 0.5-10% by weight, related to the said three components, of one or more graft copolymers having an elastomeric core which is built up for more than 50% by weight from a polymerised diene, optionally at least one intermediate phase of vinyl monomer polymerised thereon by grafting and a shell built up from a product of one or more monomers polymerised on the preceding phase by grafting and selected from the group consisting of:
- C.sub.1 -C.sub.6 alkylacrylates, C.sub.1 -C.sub.6 alkylmethacrylates, acrylic acid, methacrylic acid and mixtures of two or more of these monomers, with a crosslinking agent, and the other one is a block copolymer, characterieed in that, related to the three components, the quantity of aromatic polycarbonate resin is 80-99% by weight and that the third component is formed by 0.5-10% by weight, related to the three components, of a block copolymer of polycarbonate and polysiloxane.
Dependencies are inferred from the claim text.